Apr 25, 2014 — Scientists tracking the ancestry of whooping cough say it arose abruptly in humans about 500 years ago, caused by a mutated bacterium that once lived only in animals. Genetic tricks helped it spread.
Sep 30, 2013 — The whooping cough vaccine isn't perfect, but public health officials suspected that something else contributed to the 2010 pertussis outbreak in California. A study finds that neighborhoods where more parents filed for vaccination exemptions for their children had higher rates of infection.
Nov 28, 2012 — There were more than 9,000 whooping cough cases in California in 2010, a 60-year high. There has been a resurgence of the disease across the country lately. Why? People going without vaccination is one factor. Another may lie in the vaccines themselves.
Sep 13, 2012 — Young kids who get all their whooping cough shots on time could become susceptible to the disease again when they're between 8 and 11. Researchers say the immune protection conferred by the current vaccine loses its punch.
Aug 3, 2012 — A study from Australia finds that the current vaccine for whooping cough wanes more quickly than expected, which may be helping to fuel the epidemic that's been plaguing the West Coast of the U.S.
Jun 11, 2012 — Some 338 people have been infected with whooping cough in Oregon this year. But that's just a small fraction of the number of cases the state of Washington is reporting. Health experts say the booster shot is not 100 percent effective at preventing the disease, but people who have it are far less likely to get sick.
May 10, 2012 — About 1 in 5 infants who get whooping cough will get pneumonia, and in some cases die. In Washington state, confirmed cases are 10 times as high as they were last year.
Mar 23, 2012 — Whooping cough has reappeared in the U.S. and other developed countries in recent years, despite widespread use of vaccines. Researchers in Australia offer a partial explanation: they say the vaccine isn't tailored to fight some of the most common strains of the bacteria.
Feb 22, 2012 — An expert panel is expanding an earlier recommendation that seniors be vaccinated if they have contact with very young infants. Now just about all seniors will be candidates for vaccination. Adults and teens have been on the recommended list for years already.
Sep 17, 2010 — The state health department now says there have been nine death — all babies. The infants were 2 months old or younger when they got sick. Eight were Hispanic.